First go to the Orastery (PortWindurt) talk to Hakkuru-Rinkuru. Then head to East Sarutabaruta, Inner Horutoto Ruins (J-7) Check the "Cracked Wall (H"-9) make a left to the "Gate Magical Gizmo" Take the "Cracked Mana Orb" back to the Orastery and talk to Hakkuru-Rinkuru again.